Vainglory - Multiplayer Online Battle Arena (MOBA) made for mobile
Call of Duty - Call of Duty is a first-person and third-person shooter series by Infinity Ward.
Pairs.one - No-registration multiplayer online memory game
Xonotic - Xonotic is a free (GPL), fast-paced first-person shooter that works on Windows, OS X and Linux.
HaloMD - Play Halo 1 multiplayer online for free (on your Mac)
Battlefield - The latest news and updates for all things Battlefield, the EA and DICE video game franchise.